haha~~~
#include<cstdio>
#include<string>
#include<cstring>
#include<iostream>
using namespace std;
signed main(void) {
	ios::sync_with_stdio(false);
	string str1, str2;
	while (cin >> str1 >> str2) {
		int len1 = str1.length();
		int len2 = str2.length();
		for (int i = 0, j = 0;;) {
			if (str1[i] == str2[j] && ++i == len1) {
				printf("Yes\n");
				break;
			}
			if (++j == len2) {
				printf("No\n");
				break;
			}
		}
	}
}